Global landmarks go dark for Earth Hour

More than 7,000 cities took part in the World Wildlife Fund's campaign to raise awareness about climate change.

http://archive.freep.com/VideoNetwork/2250961065001/Global-landmarks-go-dark-for-Earth-Hourhttp://bc_gvpc_od-f.akamaihd.net/media/963482463001/201303/1589/963482463001_2250953184001_615b0dba-fe15-43f2-9913-5cee9d128492.mp4?pubId=35547428001&videoId=2250961065001http://archive.freep.com/VideoNetwork/2250961065001/Global-landmarks-go-dark-for-Earth-Hourhttp://bc_gvpc.edgesuite.net/img/963482463001/201303/2195/963482463001_2250748859001_thumbnail-for-video-2250923804001.jpgGlobal landmarks go dark for Earth HourMore than 7,000 cities took part in the World Wildlife Fund's campaign to raise awareness about climate change.44vpcbestEarth HourwwfInternational newsvpcGreen/Environmentclimate changeVPC;Reuters00:45